title: Oxidative desulfurization of fuels catalyzed by Fenton-like ionic liquids at room temperature.
abstract: Oxidation of the sulfur-containing compounds benzothiophene (BT), dibenzothiophene (DBT), and 4,6-dimethyldibenzothiophene (4,6-DMDBT) has been studied in a desulfurization system composed of model oil, hydrogen peroxide, and different types of ionic liquids [(C(8)H(17))(3)CH(3)N]Cl/FeCl(3), [(C(8)H(17))(3)CH(3)N]Cl/CuCl(2), [(C(8)H(17))(3)CH(3)N]Cl/ZnCl(2), [(C(8)H(17))(3)CH(3)N]Cl/SnCl(2), [(C(4)H(9))(3)CH(3)N]Cl/FeCl(3), [C(10)H(21)(CH(3))(3)N]Cl/FeCl(3), [(C(10)H(21))(2)(CH(3))(2)N]Cl/FeCl(3). Deep desulfurization is achieved in the Fenton-like ionic liquid [(C(8)H(17))(3)CH(3)N]Cl/FeCl(3) at 25 °C for 1 h. The desulfurization of DBT reaches 97.9%, in consuming very low amount of [(C(8)H(17))(3)CH(3)N]Cl/FeCl(3) (only 0.702 mmol). The reaction conditions, for example, the amount of [(C(8)H(17))(3)CH(3)N]Cl/FeCl(3) or H(2)O(2), the temperature, and the molar ratio of FeCl(3) to [(C(8)H(17))(3)CH(3)N]Cl, are investigated for this system. The oxidation reactivity of the different sulfur-containing compounds is found to decrease in the order of DBT>BT>4,6-DMDBT. The desulfurization system can be recycled six times without significant decrease in activity. The sulfur level of FCC gasoline could be reduced from 360 ppm to 110 ppm.
authors.affiliation: College of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China.
authors.forename: Yunqing
authors.initials: Y
authors.lastname: Jiang
authors.forename: Wenshuai
authors.initials: W
authors.lastname: Zhu
authors.forename: Huaming
authors.initials: H
authors.lastname: Li
authors.forename: Sheng
authors.initials: S
authors.lastname: Yin
authors.forename: Hua
authors.initials: H
authors.lastname: Liu
authors.forename: Qingjie
authors.initials: Q
authors.lastname: Xie
mesh_terms: D002384:Catalysis; D005742:Gasoline; D006861:Hydrogen Peroxide; D052578:Ionic Liquids / Q000737:chemistry*; D009821:Oils / Q000737:chemistry*; D013455:Sulfur; D013457:Sulfur Compounds / Q000737:chemistry*
chemical_list: D005742:Gasoline; D052578:Ionic Liquids; D009821:Oils; D013457:Sulfur Compounds; D013455:Sulfur; D006861:Hydrogen Peroxide